CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 10,420,000	$ 7,495,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,118,000	1,032,000
Provision for doubtful acccounts	238,000	3,000
Deferred income taxes	577,000	673,000
Stock based compensation expense	497,000	152,000
Changes in operating assets and liabilities:
Accounts receivable	2,386,000	2,131,000
Inventories	(7,799,000)	(5,999,000)
Prepaid expenses and other current assets	(39,000)	307,000
Other assets	0	(11,000)
Accounts payable, accrued expenses, accrued salaries and wages, accrued income taxes	(784,000)	(20,000)
Net Cash Provided by Operating Activities	6,614,000	5,763,000
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant, and equipment	(1,323,000)	(1,598,000)
Net Cash Used in Investing Activities	(1,323,000)	(1,598,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock option exercises	71,000	24,000
Cash paid for purchase of treasury stock	(2,350,000)	(3,998,000)
Net Cash Used in Financing Activities	(2,279,000)	(3,974,000)
Net Change in Cash and Cash Equivalents	3,012,000	191,000
CASH AND CASH EQUIVALENTS - Beginning	8,028,000	5,308,000
CASH AND CASH EQUIVALENTS - Ending	11,040,000	5,499,000
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid, net	24,000	18,000
Income taxes paid	735,000	258,000
Surrender of Common Shares	$ 0	$ 8,000